Method get_engine_version

bytecode/bytecode_custom.h:36–36

	virtual int get_variant_ver_major() const override { return variant_ver_major; }
	virtual int get_parent() const override { return parent; }
	virtual String get_engine_version() const override { return engine_version; }
	virtual String get_max_engine_version() const override { return max_engine_version; }
	virtual String get_date() const override { return date; }
	virtual bool is_custom() const override { return true; }